Tattoo ink cap



FIG. 1 is a right perspective view of a tattoo ink cap, showing my new design;

FIG. 2 is a top view of the tattoo ink cap in FIG. 1;

FIG. 3 is a bottom view thereof;

FIG. 4 illustrates a front and a back view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a left view thereof.

The broken lines are shown for the purpose of illustrating parts of the article that form no part of the claim. 

CLAIM The ornamental design for a tattoo ink cap, substantially as shown and described. 